EP2869456A1 - Motorbeschleunigungsvorrichtung und Verfahren - Google Patents

Motorbeschleunigungsvorrichtung und Verfahren Download PDF

Info

Publication number
EP2869456A1
EP2869456A1 EP20140187247 EP14187247A EP2869456A1 EP 2869456 A1 EP2869456 A1 EP 2869456A1 EP 20140187247 EP20140187247 EP 20140187247 EP 14187247 A EP14187247 A EP 14187247A EP 2869456 A1 EP2869456 A1 EP 2869456A1
Authority
EP
European Patent Office
Prior art keywords
angle
dwell
advanced
switching converter
microprocessor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20140187247
Other languages
English (en)
French (fr)
Inventor
Joung Ho Son
Mu Seon Woo
Hong Chul Shin
Dae Sung Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electro Mechanics Co Ltd
Original Assignee
Samsung Electro Mechanics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electro Mechanics Co Ltd filed Critical Samsung Electro Mechanics Co Ltd
Publication of EP2869456A1 publication Critical patent/EP2869456A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/08—Reluctance motors
    • H02P25/092—Converters specially adapted for controlling reluctance motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/08—Reluctance motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
    • H02P1/163—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual reluctance motor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/08—Reluctance motors
    • H02P25/092—Converters specially adapted for controlling reluctance motors
    • H02P25/0925—Converters specially adapted for controlling reluctance motors wherein the converter comprises only one switch per phase
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P31/00—Arrangements for regulating or controlling electric motors not provided for in groups H02P1/00 - H02P5/00, H02P7/00 or H02P21/00 - H02P29/00

Definitions

  • the present invention relates to a motor acceleration apparatus and a motor acceleration method.
  • a switched reluctance motor is one of the old motors that have been used over 150 years. As power semiconductors have been developed, this traditional type of reluctance motor has become known as the switched reluctance motor to meet the requirement of variable driving.
  • Switched means that a motor should always be operated in continuous switching modes. This term has been used after applying a new type of power semiconductor in accordance with development and advance of the new type of power semiconductor.
  • Reluctance means a double salient pole type structure in which a rotor and a stator are operated by varying a reluctance magnetic circuit.
  • a power transistor a gate turn-off thyristor (GTO), an insulated gate bipolar mode transistor IGBT, a power metal oxide semiconductor field effect transistor (MOSFET) and the like have been developed and variously used in a rated power range for controlling the SRM.
  • GTO gate turn-off thyristor
  • IGBT insulated gate bipolar mode transistor
  • MOSFET power metal oxide semiconductor field effect transistor
  • the SRM has a very simple structure.
  • the SRM does not include a permanent magnet, a brush, and a commutator.
  • a stator includes salient poles and has a structure in which steel sheets are stacked, and windings around which coils connected in series with each other are wound are independently connected to the respective phases and enclose stator poles.
  • a rotor does not include a winding, has a structure in which steel sheets are stacked, and includes salient poles, similar to the stator. Therefore, since both of the stator and the rotor have the salient pole structure, the SRM may be considered as having a double salient pole type structure.
  • a current sensor may be used which senses sudden current peaks in an abnormal operation to interrupt current, so that IGBT or FET damage may be prevented, compared to the SRM without such a current sensor.
  • the present invention has been made in an effort to provide a motor acceleration apparatus and a motor acceleration method which prevent a motor from being interrupted in a normal section in SRM motor control using a current sensor.
  • a motor acceleration apparatus including: a rectifying unit converting household power into direct current (DC) voltage to output the converted DC voltage; a switching converter switching the DC voltage output from the rectifying unit in an alternating current manner so as to drive a two-phase switched reluctance motor (SRM) ; and a microprocessor controlling the switching converter at the time of initial acceleration of the two-phase SRM so that an initially set dwell angle is changed to a dwell angle in a normal operation state and starting advanced-angle control.
  • DC direct current
  • SRM switched reluctance motor
  • the microprocessor upon receiving an on-signal, may control the switching converter so that low current is supplied to windings of the two-phase SRM.
  • the microprocessor may provide the switching converter with a PWM signal with a duty ratio of 4% or below so that low current is supplied to windings of the two-phase SRM.
  • the microprocessor may provide the switching converter with a PWM signal with an increasing duty ratio when the initially set dwell angle is changed to the dwell angle in the normal operation state.
  • the microprocessor may control the switching converter so that advanced-angle control is started when the initially set dwell angle is changed to the dwell angle in the normal operation state.
  • the microprocessor may perform advanced-angle control in a such manner that the advanced angle is increased from a given advanced angle, for a certain period of time, when the dwell angle is changed to the dwell angle set as the normal operation state and is then maintained.
  • the switching converter may include: a pair of upper and lower switches in each of the two windings of the two-phase SRM, the upper and lower switches being connected to each other in series above and below the corresponding winding; and a pair of diodes, each disposed at a terminal of each of the two phase windings to be connected to a power supply terminal, wherein the microprocessor controls the advanced angle by adjusting a turn-on time when the pair of upper and lower switches are turned on simultaneously, and controls the dwell angle by adjusting the turn-on time.
  • the microprocessor may include: an advanced-angle controller performing advanced-angle control by controlling the switching converter; a dwell-angle controller performing dwell angle control by controlling the switching converter; and a speed adjuster controlling the dwell-angle controller at the time of initial acceleration of the two-phase SRM so that an initially set dwell angle of the switching converter is changed to a dwell angle in a normal operation state and starting advanced-angle control of the switching converter by controlling the advanced-angle controller.
  • the microprocessor may further include a PWM duty controller providing a PWM signal with a duty ratio of 4% or below to the switching converter and providing a PWM signal with an increasing duty ratio to the switching converter when the initially set dwell angle is changed to the dwell angle in the normal operation state.
  • a PWM duty controller providing a PWM signal with a duty ratio of 4% or below to the switching converter and providing a PWM signal with an increasing duty ratio to the switching converter when the initially set dwell angle is changed to the dwell angle in the normal operation state.
  • the microprocessor may further include a negative torque determiner determining whether negative torque is generated in the two-phase SRM, if negative torque is generated in the two-phase SRM, controlling the advanced-angle controller such that the advanced angle is increased and controlling the dwell-angle controller such that the dwell angle is decreased.
  • a motor acceleration method including: (a) supplying low current to a switching converter, by a microprocessor, to initially drive a two-phase SRM; and (b) controlling, by the microprocessor, the switching converter such that an initially set swell angle is changed to a swell angle in a normal operation state and starting advanced-angle control.
  • the (a) supplying may include providing, by the microprocessor upon receiving an on-signal, the switching converter with a PWM signal with a duty ratio of 4% or below so that low current is supplied to windings of the two-phase SRM.
  • the method may further include (c) providing, by the microprocessor, a PWM signal with an increasing duty ratio to the switching converter when the initially set dwell angle is changed to the dwell angle in the normal operation state.
  • the (b) controlling may include controlling the switching converter so that advanced-angle control is started when the initially set dwell angle is changed to the dwell angle in the normal operation state.
  • the method may further include (d) controlling, by the microprocessor, the switching converter such that advanced-angle control is performed in a such manner that the advanced angle is increased from a given advanced angle, for a certain period of time, when the dwell angle is changed to the dwell angle set as the normal operation s state and is then maintained.
  • the method may further include: (e) determining, by the microprocessor, whether negative torque is generated in the two-phase SRM; and (f) increasing the advanced angle and decreasing the dwell angle, by the microprocessor, if it is determined that negative torque is generated in the two-phase SRM.
  • FIG. 1 is a block diagram of an acceleration apparatus for a two-phase switched reluctance motor (SRM) according to a preferred embodiment of the present invention.
  • SRM switched reluctance motor
  • the acceleration apparatus for a two-phase switched reluctance motor may include a rectifying unit 20 rectifying alternating current (AC) power from a household power source 10 to supply direct current (DC) power, a capacitor 30 connected to the rectifying unit 20, a switching converter 40 connected to the capacitor 30, and a microprocessor 60 sensing the positions and speed of a two-phase SRM 50 to control the switching converter 40.
  • AC alternating current
  • DC direct current
  • the rectifying unit 20 rectifies input AC power from the household power source 10 so as to supply DC power to the capacitor 30.
  • the capacitor 30 may improve a power factor of the rectified DC power, absorb noise, to supply it to the switching converter 40.
  • the switching converter 40 may include a pair of upper and lower switches in each of two phase windings of the two-phase SRM 50, the upper and lower switches being connected to each other in series above and below the corresponding winding, and each disposed at a terminal of each of the two phase windings to be connected to a power supply terminal, wherein the switching convert 40 may be operated in operation modes 1 to 3 according to control of the microprocessor 60 to drive the two-phase SRM 50.
  • the microprocessor 60 may sense the position and the speed of the two-phase SRM 50 and control the pair of upper and lower switches of the switching converter 40 to allow the switches to be operated in operation modes 1 to 3, thereby driving the two-phase SRM 50.
  • operation mode 1 positive DC voltage is applied to a corresponding phase winding of the two-phase SRM 50 to increase current in the winding, in operation mode 2, the current is allowed to be circulated in the winding when it flows in the winding, such that it is slowly decreased, and in operation mode 3, negative DC voltage is applied to a corresponding phase winding to rapidly decrease the current.
  • the acceleration apparatus for a two-phase switched reluctance motor thus configured is operated as follows.
  • the microprocessor 60 controls the switching converter 40 such that it is operated in operation modes 1 to 3 to excite one of the two phase windings of the two-phase SRM 50 and then finish the excitation state. Subsequently, the microprocessor 60 controls the switching converter 40 such that it is operated in the operation modes 1 to 3 to excite the other of the two phase windings of the two-phase SRM 50 and then finish the excitation state.
  • microprocessor 60 repeats the above-described operations to drive the two-phase SRM 50.
  • microprocessor 60 may control the switching converter 40 such that it is operated in the operation modes 1 to 3.
  • the microprocessor 60 may control an advanced angle by adjusting a turn-one time and may control a conduction angle by adjusting a turn-one time period in accordance with the speed of the two-phase SRM 50 based on the waveform of an encoder.
  • the driving of the two-phase SRM 50 may be controlled by changing an advanced angle, a dwell angle, and a pulse width modulation (PWM) duty ratio.
  • PWM pulse width modulation
  • the advanced angle refers to a period in which power is applied to the winding to excite the winding.
  • a turn-on time becomes sooner, such that a current rising time is changed.
  • RPM revolution per minute
  • the advanced angle to make the turn-on time sooner, a sufficient current rising time is ensured, and by adjusting the dwell angle to make the most of a torque generation region while minimizing the magnitude of the current before it reaches a section in which the negative torque is generated, the generation of the negative torque may be suppressed. That is, in the case where the dwell angle is adjusted, the torque generation region may be utilized as much as possible, but the magnitude of the current may be minimized before it reaches the section in which the negative torque is generated.
  • the torque characteristic of the SRM is unrelated to the directions of the current and has the same sign as that of a gradient of the inductance, it may not be possible to rotate the SRM in the reverse direction by controlling the current only. Therefore, in order to rotate the SRM in the forward or reverse direction, it requires controlling the angle to allow the current to flow in a section in which a torque is generated in a desired rotation direction. In addition, the angle control may also be used at the time of sudden braking.
  • the dwell angle refers to a difference between a turn-off angle and a turn-on angle where the position of a rotor at which a stator current is switched on is the turn-on angle and the position of the rotor at which the stator current is switched off in the SRM is the turn-off angle.
  • the section in which the torque is generated is changed in the SRM, such that the variation of the load of the SRM may be controlled.
  • the PWM duty ratio By changing the PWM duty ratio, the current flowing in the two-phase SRM is controlled, such that the variation of the load of the two-phase SRM may be controlled.
  • the changing of the PWM duty ratio to control the variation of the load of the two-phase SRM may be mainly used to control the two-phase SRM driven at low speed or medium speed.
  • the switching device is turned on or turned off by chopping, thereby controlling the SRM at a desired speed.
  • the first section 210 shown in FIG. 2 refers to a state right after an on-signal is input to the microprocessor 60.
  • the microprocessor 60 controls the switching converter 40 such that small amount of power flows in one of the windings of the two-phase SRM 50, so that the stator and the rotor of the SRM move to their positions to be in a driving standby state.
  • the dwell angle may be set as an initially set dwell angle.
  • the duty ratio of the PWM signal provided to the switching converter 40 by the microprocessor 60 is preferably 4% or less (more preferably 4%), preferably for 1 sec or shorter.
  • the second section 220 refers to a state in which the microprocessor 60 starts to accelerate the two-phase SRM 50 to start the normal operation.
  • the dwell angle of the SRM is changed from the initially set dwell angle (approximately 60% to 80%) to a dwell angle set as the normal operation state (approximately 40% to 60%).
  • the PWM duty ratio for initial driving of the motor may rise. That is, by changing the PWM duty ratio, the current flowing in the two-phase SRM is controlled, such that the variation of the load of the two-phase SRM may be controlled.
  • the microprocessor 60 causes the PWM duty ratio to rise when the dwell angle is changed from the initially set dwell angle to a dwell angle set as the normal operation state.
  • the acceleration time may be approximately 3.5 seconds.
  • the microprocessor 60 causes the PWM duty ratio to rise when the dwell angle is changed from the initially set dwell angle to a dwell angle set as the normal operation state, so that PWM duty ratio rises when the total current amount is reduced due to the change of the dwell angle to thereby increase the total current amount, thereby obtaining smooth acceleration characteristic at the initial acceleration.
  • the third section 230 refers to an operation control mode section in which the advanced angle (lead angle) is controlled.
  • the advanced angle when the advanced angle is changed, a turn-on time becomes sooner, such that a current rising time is changed. That is, in the third section 230, by changing the advanced angle, the revolution per minute (rpm) of the SRM may be adjusted.
  • the microprocessor 60 may perform advanced-angle control in a such manner that the advanced angle is increased from a given advance angle, for a certain time period, when the dwell angle is changed to the dwell angle set as the normal operation state and is then maintained.
  • the microprocessor 60 starts advanced-angle control when the dwell angle is changed to the dwell angle set as the normal operation state, the turn-on time becomes sooner and thus the current rising time is increased, thereby preventing current peaks.
  • the fourth section 240 refers to a section in which the PWM frequency increases to the maximum value such that the SRM is driven at the maximum PWM duty ratio.
  • the SRM may be driven at a normal speed.
  • the microprocessor 60 starts advanced-angle control when the dwell angle is changed to the dwell angle set as the normal operation state, the turn-on time becomes sooner and thus the current rising time is increased, thereby preventing current peaks.
  • FIG. 3 is a circuit diagram of the switching converter shown in FIG. 1 .
  • the switching converter of FIG. 1 may include a first upper switch S1 connected in series to the upper portion of the winding of phase A, a first lower switch S2 connected in series to the lower portion of the winding of phase A, a second upper switch S3 connected in series to the upper portion of the winding of phase B, and a second lower switch S4 connected in series to the lower portion of the winding of phase B.
  • the switching converter 40 includes a first diode D1 having an anode connected to the node between the winding of phase A and the first lower switch S2 and a cathode connected to a power supply terminal at one side, and a second diode D2 having an anode connected to a power input terminal at another side and a cathode connected to the node between the winding of phase A and the first upper switch S 1.
  • the switching converter 40 includes a third diode D3 having an anode connected to the node between the winding of phase B and the second lower switch S4 and a cathode connected to a power input terminal at one side, and a fourth diode D4 having an anode connected to a power input terminal at another side and a cathode connected to the node between the winding of phase B and the second upper switch S3.
  • the first upper switch S1 and the first lower switch S2 are turned on. Then, as shown in FIG. 4A , a current loop is formed by the first upper switch S1, the winding of phase A, and the first lower switch S2 (phase A operation mode 1).
  • the switching converter 40 After a time period has elapsed from when the first upper switch S1 and the first lower switch S2 are turned on, the switching converter 40 enters a normal operation section from T1 to T2, such that a current Isa by an applied voltage flows in the first upper switch S1.
  • the current Isa flowing in the first upper switch S1 is gradually decreased with time.
  • a voltage Vsa across the first upper switch S1 becomes 0 when it is turned on.
  • the zero voltage switching converter 40 enters the normal operation section, such that a current Isb by application of a DC voltage flows in the first lower switch S2.
  • the current Isb flowing in the first lower switch S2 is gradually decreased with time.
  • a voltage Vsb across the first lower switch S2 becomes 0 when it is turned on.
  • the first upper switch S 1 is turned off, and the first lower switch S2 is maintained in a turn-on state. Then, as shown in FIG. 4B , a current loop is formed by the winding of phase A, the first lower switch S2, and the second diode D2 (phase A operation mode 2).
  • the first lower switch S2 since the first lower switch S2 is maintained in a turn-on state, the current is slowly decreased, and the voltage is not changed from zero voltage as it is turned on.
  • a current Idb flowing in the second diode D2 is the same as the current flowing in the first lower switch S2.
  • the first lower switch S2 is turned off (section from T4 to T5).
  • a current Ida flowing through the first diode D1 is the same as the current flowing in the second diode D2.
  • a process is repeated which includes turning off the second upper switch S3 while the second lower switch S4 is maintained in the turn-on state (a phase B operation mode 2), turning off the second lower switch S4 after a predetermined time (a phase B operation mode 3), and turning on the first upper switch S1 while the second lower switch S2 is maintained in the turn-on state (overlapping between the phase B operation mode 3 and the phase A operation mode 1) and maintaining the first upper switch S1 in the turn-on state (the phase A operation mode 1), to drive the motor.
  • the first lower switch S2 and the second lower switch S4 are turned on in each half period while having a phase difference of 180 degrees therebetween, as shown in FIG. 5 .
  • the first upper switch S 1 and the second upper switch S3 are also turned on with time intervals therebetween, as shown in FIG. 5 .
  • the switching converter 40 may adjust the advanced angle (or lead angle) of the winding of phase A by adjusting turn-on time of the first upper switch S 1 and the first lower switch S2 with respect to the waveform of an encoder.
  • the switching converter 40 may adjust the dwell angle of the winding of phase A by adjusting turn-on time of the first upper switch S 1.
  • the switching converter 40 may adjust the advanced angle (or lead angle) of the winding of phase B by adjusting turn-on time of the second upper switch S3 and the second lower switch S4 with respect to the waveform of an encoder.
  • the switching converter 40 may adjust the dwell angle of the winding of phase B by adjusting turn-on time of the second upper switch S3.
  • FIG. 6 is a block diagram of the microprocessor shown in FIG. 1 .
  • the microprocessor shown in FIG. 1 may include a speed adjuster 600, a negative torque determiner 610, a PWM duty controller 620, an advanced-angle controller 630, and a dwell-angle controller 640.
  • the speed adjuster 600 may be implemented so as to determine whether the target driving speed has been reached in driving the two-phase SRM. For example, when it is desired to drive the SRM at 1000 rpm, the target speed of the SRM may be set to 1000 rpm, and it may be determined that the current driving speed has arrived at the target speed.
  • the speed adjuster 600 controls the PWM duty controller 620, the advanced-angle controller 630, and the dwell-angle controller 640 so that the current speed approximates to the target speed.
  • the negative torque determiner 610 may determine whether the negative torque has been generated in the two-phase SRM 50.
  • the negative torque determiner 610 determines that no negative torque has been generated, it may be determined that the SRM is in a target operation state and the two-phase SRM 50 may be driven with the set dwell angle and advanced angle.
  • the negative torque determiner 610 may instruct the dwell-angle controller 640 to decrease the dwell angle and may instruct the advanced-angle controller 630 to increase the advanced angle.
  • the PWM duty controller 620 controls the duty of the PWM signal provided to the switching converter 40 of the two-phase SRM 50.
  • the advanced-angle controller 630 controls the advanced angle by controlling the switching converter 40 of the two-phase SRM 50.
  • the dwell-angle controller 640 controls the dwell angle by controlling the switching converter 40 of the two-phase SRM 50.
  • the speed adjuster 600 controls the PWM duty controller 620 so that it provides an initial starting current immediately after an on-signal comes in the first section 210 shown in FIG. 2 .
  • the PWM duty controller 620 provides the initial starting current of low level such that the duty ratio of the PWM signal provided to the switching converter 40 is 4% or below, preferably 4%.
  • the PWM duty controller 620 provides the switching converter 40 with the initial starting current such that small amount of power flows in one of the windings of the two-phase SRM 50, the stator and the rotor of the SRM move to their positions to be in a driving standby state.
  • the dwell-angle controller 640 sets the dwell angle as the initially set dwell angle.
  • the speed adjuster 600 controls the PWM controller 620 so that it increases the duty ratio, and controls the dwell-angle controller 640 so that it changes the dwell angle of the two-phase SRM from the initially set dwell angle to the dwell angle set as the normal operation state.
  • the PWM duty controller 620 increases the PWM duty ratio for initial driving. By changing the PWM duty ratio in this manner, the current flowing in the two-phase SRM is controlled, such that the variation of the load of the two-phase SRM may be adjusted.
  • the dwell-angle controller 640 may change the dwell angle of the two-phase SRM from the initially set dwell angle to the dwell angle set as the normal operation state.
  • the speed adjuster 600 causes the PWM duty ratio to rise when the dwell angle is changed from the initially set dwell angle to the dwell angle set as the normal operation state.
  • the microprocessor 60 causes the PWM duty ratio to rise when the dwell angle is changed from the initially set dwell angle to a dwell angle set as the normal operation state, so that PWM duty ratio rises when the total current amount is reduced due to the change of the dwell angle to thereby increase the total current amount, thereby obtaining smooth acceleration characteristic at the initial acceleration.
  • the speed adjuster 600 controls the advanced-angle controller 630 so that it increases the advanced angle in the third section 230 shown in FIG. 2 .
  • the advanced-angle controller 630 performs advanced-angle control in a such manner that the advanced angle is increased from a given advance angle, for a certain time period, when the dwell angle is changed to the dwell angle set as the normal operation state and is then maintained.
  • a turn-on time becomes sooner, such that a current rising time is changed. That is, in the third section 230, by changing the advanced angle, the revolution per minute (rpm) of the SRM may be adjusted.
  • the speed adjuster 600 starts advanced-angle control when the dwell angle is changed to the dwell angle set as the normal operation state, the turn-on time becomes sooner and thus the current rising time is increased, thereby preventing current peaks.
  • the speed adjuster 600 controls the PWM duty controller 620 so that it maintains the PWM duty.
  • the negative torque determiner 610 may determine whether the negative torque has been generated in the two-phase SRM 50.
  • the negative torque determiner 610 determines that no negative torque has been generated, it may be determined that the SRM 50 is in a target operation state and the two-phase SRM 50 may be driven with the set dwell angle and advanced angle.
  • the negative torque determiner 610 may instruct the dwell-angle controller 640 to decrease the dwell angle and may instruct the advanced-angle controller 630 to increase the advanced angle.
  • the microprocessor 60 starts advanced-angle control when the dwell angle is changed to the dwell angle set as the normal operation state, the turn-on time becomes sooner and thus the current rising time is increased, thereby preventing current peaks.
  • FIG. 7 is a flowchart illustrating a method of accelerating a two-phase SRM according to a first preferred embodiment of the present invention.
  • initial driving is performed (S700).
  • operation S700 the operation of the first section of FIG. 2 described above may be performed.
  • operation S700 in order to perform the initial driving of the SRM, small amount of power may be allowed to flow in the windings of the SRM to move the stator and the rotor of the SRM to move to their positions to be in a driving standby state.
  • the dwell angle of the SRM is changed from the initially set dwell angle to the dwell angle set in the normal operation state. That is, a control for the PWM duty ratio, the advanced angle, and the dwell angle is performed in order to perform the initial driving of the SRM, thereby making it possible to change the SRM to be in a normal driving step.
  • the speed adjuster 600 controls the PWM duty controller 620 so that it provides an initial starting current immediately after an on-signal comes in.
  • the PWM duty controller 620 provides the initial starting current of low level such that the duty ratio of the PWM signal provided to the switching converter 40 is 4% or below, preferably 4%.
  • the PWM duty controller 620 provides the switching converter 40 with the initial starting current such that small amount of power flows in one of the windings of the two-phase SRM 50, the stator and the rotor of the SRM move to their positions to be in a driving standby state.
  • the PWM duty ratio is increased so as to drive the two-phase SRM 50 at normal speed.
  • the SRM may be operated at a set dwell angle and an advanced angle.
  • the speed adjuster 600 controls the PWM duty controller 620 so that it increases the duty ratio, and controls the dwell-angle controller 640 so that it changes the dwell angle of the two-phase SRM from the initially set dwell angle to the dwell angle set as the normal operation state.
  • the PWM duty controller 620 increases the PWM duty ratio for initial driving. By changing the PWM duty ratio in this manner, the current flowing in the two-phase SRM is controlled, such that the variation of the load of the two-phase SRM may be adjusted.
  • the dwell-angle controller 640 may change the dwell angle of the two-phase SRM from the initially set dwell angle to the dwell angle set as the normal operation state.
  • the speed adjuster 600 causes the PWM duty ratio to rise when the dwell angle is changed from the initially set dwell angle to the dwell angle set as the normal operation state.
  • the operation control mode refers to an operation mode of comparing a current speed with a target speed so as to instruct to control the current speed to be the target speed.
  • the operation control mode of the two-phase SRM may determine whether a target speed has been reached, and whether negative torque has been generated if the target speed has been reached, to change an advanced angle and a dwell angle.
  • the speed adjuster 600 of the microprocessor 60 determines whether a target speed has been reached (S730).
  • the speed adjuster 600 controls the advanced angle so that the two-phase SRM may be driven at the target speed.
  • the advanced-angle controller 630 performs advanced-angle control in a such manner that the advanced angle is increased from a given advance angle, for a certain time period, when the dwell angle is changed to the dwell angle set as the normal operation state and is then maintained.
  • the negative torque determiner 610 determines whether negative torque has been generated (S740).
  • the advanced angle may be increased and the dwell angle may be decreased (S745).
  • the advanced angle may be increased by 5 degrees and the dwell angle may be decrease by 3 degrees.
  • the microprocessor 60 starts advanced-angle control when the dwell angle is changed to the dwell angle set as the normal operation state, the turn-on time becomes sooner and thus the current rising time is increased, thereby preventing current peaks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electric Motors In General (AREA)
EP20140187247 2013-10-16 2014-10-01 Motorbeschleunigungsvorrichtung und Verfahren Withdrawn EP2869456A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130123528A KR101482441B1 (ko) 2013-10-16 2013-10-16 모터 가속 장치 및 그 방법

Publications (1)

Publication Number Publication Date
EP2869456A1 true EP2869456A1 (de) 2015-05-06

Family

ID=51743263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20140187247 Withdrawn EP2869456A1 (de) 2013-10-16 2014-10-01 Motorbeschleunigungsvorrichtung und Verfahren

Country Status (4)

Country Link
US (1) US20150102751A1 (de)
EP (1) EP2869456A1 (de)
KR (1) KR101482441B1 (de)
CN (1) CN104579095A (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105007007B (zh) * 2015-08-18 2017-10-10 山东省科学院自动化研究所 一种两相开关磁阻电机控制器的控制方法
US10476421B1 (en) * 2018-08-28 2019-11-12 Caterpillar Inc. Optimized switched reluctance phase current control in a continuous conduction mode
CN113014174B (zh) * 2021-03-31 2022-12-16 苏州英威腾电力电子有限公司 一种电机转子初始位置的检测方法、系统及相关组件
CN116317811A (zh) * 2021-12-21 2023-06-23 莱克电气股份有限公司 开关磁阻电机的控制方法、装置、烹饪设备和存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0396858A2 (de) * 1989-05-09 1990-11-14 General Electric Company Steuersystem hoher Schalthäufigkeit für einen Reluktanzmotor
KR20010036470A (ko) 1999-10-08 2001-05-07 구자홍 에스알엠 모터의 속도제어방법
GB2410847A (en) * 2004-02-05 2005-08-10 Dyson Ltd Control of motor winding energisation according to rotor angle
JP2012005275A (ja) 2010-06-18 2012-01-05 Daihatsu Motor Co Ltd モータ駆動制御装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10008299A1 (de) * 2000-02-23 2001-09-27 Daimler Chrysler Ag Verfahren zum Betreiben eines elektrischen Generator/Motor-Systems
KR100415725B1 (ko) * 2001-05-02 2004-01-24 안진우 스위치드 릴럭턴스 전동기의 속도-토오크 특성 조정방식
CN1412931A (zh) * 2001-10-10 2003-04-23 乐金电子(天津)电器有限公司 单相开关磁阻电机驱动方法
CN102570939A (zh) * 2010-12-23 2012-07-11 北京中纺锐力机电有限公司 一种开关磁阻电机驱动控制系统、角度控制装置及方法
KR101321307B1 (ko) * 2011-10-31 2013-10-28 삼성전기주식회사 스위치드 릴럭턴스 모터의 구동 장치 및 그 방법
CN102611369B (zh) * 2012-03-19 2015-05-13 淄博京科电气有限公司 电动汽车专用开关磁阻电机调速系统

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0396858A2 (de) * 1989-05-09 1990-11-14 General Electric Company Steuersystem hoher Schalthäufigkeit für einen Reluktanzmotor
KR20010036470A (ko) 1999-10-08 2001-05-07 구자홍 에스알엠 모터의 속도제어방법
GB2410847A (en) * 2004-02-05 2005-08-10 Dyson Ltd Control of motor winding energisation according to rotor angle
JP2012005275A (ja) 2010-06-18 2012-01-05 Daihatsu Motor Co Ltd モータ駆動制御装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ALRIFAI M T ET AL: "Backstepping nonlinear speed controller for switched-reluctance motors", IEE PROCEEDINGS: ELECTRIC POWER APPLICATIONS, INSTITUTION OF ELECTRICAL ENGINEERS, GB, vol. 150, no. 2, 23 January 2003 (2003-01-23), pages 193 - 200, XP006019767, ISSN: 1350-2352, DOI: 10.1049/IP-EPA:20030229 *

Also Published As

Publication number Publication date
US20150102751A1 (en) 2015-04-16
CN104579095A (zh) 2015-04-29
KR101482441B1 (ko) 2015-01-13

Similar Documents

Publication Publication Date Title
US6577087B2 (en) Multilevel DC link inverter
JP5501231B2 (ja) 単一スイッチ方式のスイッチドリラクタンス機を制御する方法、制御装置、および電力変換装置
JP4341266B2 (ja) ブラシレスｄｃモータの駆動方法及びその装置
JP4023353B2 (ja) 車両用三相回転電機用インバータ回路装置
EP2869456A1 (de) Motorbeschleunigungsvorrichtung und Verfahren
JP5524377B2 (ja) ２相スイッチドリラクタンスモータのスイッチング装置及びその制御方法
US20140184112A1 (en) Method and apparatus of controlling driving of two-phase switched reluctance motor
KR20080103846A (ko) 모터의 운전제어장치 및 방법
JP5428746B2 (ja) ブラシレスｄｃモータの駆動装置およびこれを用いた電気機器
JP2015164385A (ja) 可変速電気機械
US20140184131A1 (en) Method and apparatus of controlling switched reluctance motor
JP2010226842A (ja) ブラシレスｄｃモータの制御方法およびブラシレスｄｃモータの制御装置
US9407168B2 (en) Power converting circuit
KR100296303B1 (ko) 비엘디씨 모터의 토크리플 저감방법
JP6244482B2 (ja) モータ駆動装置
JP4174948B2 (ja) エネルギー貯蔵装置
Hamdy et al. High-speed performance improvements of a two-phase switched reluctance machine utilizing rotor-conducting screens
JP2013541317A (ja) 内燃機関によって駆動される発電機の回転の不均一性に起因する電圧リップルを低減するための方法
US20130300328A1 (en) Switching control apparatus for two phase switched reluctance motor and method thereof
US11469701B2 (en) Technologies for adaptive multi-pulse commutation for brushless direct current motors
US20160056746A1 (en) Apparatus for driving srm and controlling method thereof
KR20160008085A (ko) 모터 구동장치 및 그 제어방법
WO2024044109A1 (en) Boosted rotor supply circuit and method for improving pulsed electric machine efficiency
US20160049893A1 (en) Apparatus for driving motor and controlling method thereof
JP2019083595A (ja) モータ駆動装置および、これを用いた冷蔵庫

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20141001

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20151107